| http://www.w3.org/ns/prov#value | - f said ridges being any form of reduction in said ridge projecting outward in said horizontal direction between the ends of the height of said ridges, including a slot cutting through a part or whole of said ribs, (l) said male connection element being of such a shape that by snap-effect is able to be received and releasably secured in said female connection element, (m) whereby said male connecti
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